Abstract
We report the observation of oscillatory redox reactions on the surface of multilayer graphene oxide (GO) films at room temperature. The redox reactions exhibited dampened oscillatory behavior with a period of about 5 days and were found to be dependent on the time elapsed from film deposition. The kinetic behavior observed for the oxidation-reduction reactions and the metastability of the surface functional groups are adequately described by two models involving GO reactions and reactant diffusion.
| Original language | English |
|---|---|
| Pages (from-to) | 78194-78201 |
| Number of pages | 8 |
| Journal | RSC Advances |
| Volume | 6 |
| Issue number | 81 |
| DOIs | |
| State | Published - 2016 |
Funding
† This manuscript has been authored by UT-Battelle, LLC under Contract no. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). ‡ Electronic supplementary information (ESI) available. See DOI: 10.1039/c6ra14414d This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. A portion of this research was conducted at the Center for Nanophase Materials Sciences ORNL, which is a DOE Office of Science User Facility. D. N. V. thanks Prof. Gustavo A. Carri, Dr Eric Olsen, Prof. Bobby G. Sumpter for the helpful discussions. This manuscript is dedicated to the memory of late Dr Igor A. Merkulov, who passed away on July 4, 2014, while working on revisions to this manuscript.